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# Newton's law of gravitation

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1. The gravitational field strength at the surface of Jupiter is 27 N/kg. The radius of Jupiter is 11 times that of Earth. Calculate the mass of Jupiter, taking the radius of the Earth to be 6.4 x 10^6 m.

I used g=GM/r^2 and tried equalling g of earth * radius of earth^2/mass of earth to g of jupiter * radius of jupiter^2/mass of jupiter.
However, I have not been provided info for mass of earth.

2. (Original post by science24601)
The gravitational field strength at the surface of Jupiter is 27 N/kg. The radius of Jupiter is 11 times that of Earth. Calculate the mass of Jupiter, taking the radius of the Earth to be 6.4 x 10^6 m.

I used g=GM/r^2 and tried equalling g of earth * radius of earth^2/mass of earth to g of jupiter * radius of jupiter^2/mass of jupiter.
However, I have not been provided info for mass of earth.

Never mind I've worked it out

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